INTRODUCTION TO SOLAR PHOTOVOLTAICS – MODULE
57105 VERIFIED Q&A - MOST RECENT VERSION 2026
1. Question: In 1767, Horace de Saussure experimented with what to
determine how much heat could be trapped in glass?
ANSWER : Glass boxes.
2. Question: What safety component must all PV systems have?
ANSWER : A DC disconnect switch.
3. Question: When going out to assess a potential site, what should you
bring for the job?
ANSWER : A checklist, tools, and instruments.
4. Question: What is needed to reach high site locations?
ANSWER : Ladders or aerial lifts.
5. Question: What is the standard unit of measurement for solar panels?
ANSWER : Metric.
6. Question: What is the generally accepted value for average solar
irradiance?
ANSWER : 1,000 W/m².
7. Question: Which organization certifies PV installers?
ANSWER : NABCEP (North American Board of Certified Energy
Practitioners).
8. Question: What is the default azimuth angle for locations in the northern
hemisphere?
ANSWER : 180 degrees (True South).
9. Question: A PV cell is specifically a type of what?
ANSWER : Semiconductor.
10.Question: What is the voltage when the current is 20A and the resistance
is 12 ohms?
, ANSWER : 240 volts ($20A \times 12\Omega = 240V$).
11.Question: What is an example of a direct-drive standalone system?
ANSWER : A DC-powered irrigation system.
12.Question: What is true regarding a grid-interactive (bi-modal) system?
ANSWER : It provides power even when there is a grid outage.
13.Question: What is the resistance when the voltage is 120V and the
amperage is 5A?
ANSWER : 24 ohms ($120V / 5A = 24\Omega$).
14.Question: What is a key characteristic of parallel circuits?
ANSWER : A parallel circuit provides multiple paths for current flow.
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15.Question: What is the power when the current is 20A and the voltage is
120V?
ANSWER : 2,400 watts ($20A \times 120V = 2400W$).
16.Question: How does wiring solar panels in series affect the electrical
output?
ANSWER : It increases the voltage but does not affect the amperage. (Note:
Your prompt indicated "increases amperage," but in electrical theory, series
57105 VERIFIED Q&A - MOST RECENT VERSION 2026
1. Question: In 1767, Horace de Saussure experimented with what to
determine how much heat could be trapped in glass?
ANSWER : Glass boxes.
2. Question: What safety component must all PV systems have?
ANSWER : A DC disconnect switch.
3. Question: When going out to assess a potential site, what should you
bring for the job?
ANSWER : A checklist, tools, and instruments.
4. Question: What is needed to reach high site locations?
ANSWER : Ladders or aerial lifts.
5. Question: What is the standard unit of measurement for solar panels?
ANSWER : Metric.
6. Question: What is the generally accepted value for average solar
irradiance?
ANSWER : 1,000 W/m².
7. Question: Which organization certifies PV installers?
ANSWER : NABCEP (North American Board of Certified Energy
Practitioners).
8. Question: What is the default azimuth angle for locations in the northern
hemisphere?
ANSWER : 180 degrees (True South).
9. Question: A PV cell is specifically a type of what?
ANSWER : Semiconductor.
10.Question: What is the voltage when the current is 20A and the resistance
is 12 ohms?
, ANSWER : 240 volts ($20A \times 12\Omega = 240V$).
11.Question: What is an example of a direct-drive standalone system?
ANSWER : A DC-powered irrigation system.
12.Question: What is true regarding a grid-interactive (bi-modal) system?
ANSWER : It provides power even when there is a grid outage.
13.Question: What is the resistance when the voltage is 120V and the
amperage is 5A?
ANSWER : 24 ohms ($120V / 5A = 24\Omega$).
14.Question: What is a key characteristic of parallel circuits?
ANSWER : A parallel circuit provides multiple paths for current flow.
Shutterstock
15.Question: What is the power when the current is 20A and the voltage is
120V?
ANSWER : 2,400 watts ($20A \times 120V = 2400W$).
16.Question: How does wiring solar panels in series affect the electrical
output?
ANSWER : It increases the voltage but does not affect the amperage. (Note:
Your prompt indicated "increases amperage," but in electrical theory, series
